Edmund a



(No Model.)

E. A. SCHADE.

FLOOR CLAMP.

No. 466,142. Patented Dec. 29, 1891.

umy

ll ma@ UNITED STATES PATENT OFFICE.

EDMUND A. SCHADE, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEYRULE AND LEVEL COMPANY, OF SAME PLACE.

FLOOR-CLAIVI P.

SPECIFICATION forming part of Letters Patent No. 466,142, dated December29, 1891.

Application filed May 9, 1891. Serial 110.392,172. (No model.)

T0 a/ZZ whom it may concern:

Be it known that I, EDMUND A. SCHADE, a citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inFloor-Clamps, of which the following is a specification.

My 'invention relates to improvements in door-clamps; and the objects ofmy improvement are simplicity and cheapness of construction andconvenience and efficiency of the article.

In the accompanying drawings, Figure lis a plan view of my floor-clamp.Fig. 2 is a longitudinal section on line w of Fig. 1, partly inelevation. Fig. 3 is a partial section on line y y of Fig. 2, with theupper portion in elevation; and Fig. 4 is a longitudinal section of aportion of the holding-bed with a modi- Iied form of holding-point.

A designates the frame or principal part of the machine,`having apresser-face 5 at its front end and uprights or supports 6 6 toward itsrear end, within which uprights I form the bearings for the screw orWorm 7 and gear-wheel 8. The screw or Worm is provided with anoperating-handle 9, of any ordinary form, and the worm and gear wheelengage with each other, as shown,the handle turning on a vertical axis.vUpon suitable ways in the middle portion of the frame A, near its base,is the holding-bed B, the relative movement of said bed and frame beingin a direction that extends at right angles to the axis of theoperating-handle. The upper part of the holding-bed is provided with arack 10, which is engaged by the gear-wheel S. At the front end of thisholdingbed,with in a suitable socket, I arrange the holdingpoint 11, thesame being set somewhat upon an incline, as shown. The upper end of thispoint is headed, and toward the lower end is the extreme lower end ofsaid point be raised up flush with the under face of said holdingbed.

The middle portion of the frame A is left open to permit. the socketportion of the holding-bed to work Within said open middle portion andto extend down practically into the same plane as the bottom face ofsaid frame.

My floor-clamp may be used when laying a oor directly upon joist, orwhen laying a floor over an old one, or over one laid as a foundationfor the tloor proper. In Fig. 2 I have indicated in broken linesportions of the joist 14, the foundation-floor 15, and floorboards 16,together with a temporary strip 17. The floor-clamp is placed inposition with its holding-face 5 against the temporary strip or edge ofthe last floor-board, as vmay be desired. The handle 9 is revolved tobring the holding-bed to or near its most forward position within theframe, after which a blow or blows with a hammer upon the head of theholding-point 11 will force said point intothe Hoor-foundation, so as tofasten the holdingbed in place. The handle 9 is then revolved in adirection to push the holding-frame firmly against the temporary stripor flooring to bring the last door-board into place, when it can benailed. The handle is then turned in the opposite direction to releasethe pressure of the frame, and by lifting upon the handle or rear partof the frame the holding-point can be readily withdrawn. If desired, thepoint might be first withdrawn by means of a claw-hammer or other tool.

In Figs. 1, 2, and 3 I have represented a smooth point, which is squarein cross-section, while in Fig. 4. I have shown a point 11a, with asquare head, a round body, and tapering threaded portion at its lowerend. It is also shouldered, as at 12, and held against accidentalremoval by the screw 13, This point will be started into thefloor-support by a light blow and then screwed farther in. It is removedby unscrewing until it is loosened. These points, although somewhatdifferent in details of construction, I consider equivalents in thegeneral combination. I have represented the presser-face 5 of the frameas a plain vertical face; but, if desired, it may be grooved to receivethe tongue of the flooring, as indicated by the broken lines in Fig. 3.

I am aware that an English patent shows and describes a flooring-clamphaving a t' rame Vand attached holding-clamp, a vertical Worm,

a Worm-Wheel actuated by a lever-handle, and a toothed ram, also gearingwith said Wormwheel and having a presser-face; also, that a prior patentshows and describes a floorjaek having a head-block with a cam andoperating-lever mounted thereon, and a holdin g-bloek having two slidingholding-claws at its rear edge, said block and head being arranged toslide relatively to each other on pins and grooves. All of said priorart is hereby disclaimed.

In my floor-clamp the holding-point is located between the drivingmechanism and the presser-face, so that pulling on said point inimparting a relative movement of the frame and holding-bed draws theholding-bed rml y down on the surface, upon Which it rests Without anytendency to cock or tip.

I claim as my inventionl. The herein-described floor-clamp, consistingof a frame, a holding-bed tted thereto wheel'S and the worm 7, mountedon said.

frame, the holding-bed fitted Within the middle opening of said frameand having the rack lOfor engaging said gear-Wheel, and theslidingholdiiig-pointarranged Within asocket at the front end ot' saidholding-bed and Within the middle opening of said frame, substantiallyas described, and for the purpose speeilied.

EDMUND A. SCHADE. Witnesses:

JAMEs SHEPARD, JOHN EDWARDS, Jr.

